The previous page is sending you to https://www.milestone-books.de/pages/books/003459/leonhard-euler-j-b-wiedeburg-margaretha-kirch/beantwortung-verschiedener-fragen-uber-die-beschaffenheit-bewegung-und-wurckung-der-cometen?soldItem=true.

 If you do not want to visit that page, you can return to the previous page.